X-Git-Url: https://git.cworth.org/git?p=tar;a=blobdiff_plain;f=m4%2Ferror.m4;fp=m4%2Ferror.m4;h=dd5a197b6ec9214bc06794bb437cc246b93010b3;hp=9f1307a428e297d89b8ef96a9affe82dcf091384;hb=b414e25de8ca49d7567a92c203d431383ec57c83;hpb=29ece34f44a27750bbfd76154ad9882580453dc7

diff --git a/m4/error.m4 b/m4/error.m4
index 9f1307a..dd5a197 100644
--- a/m4/error.m4
+++ b/m4/error.m4
@@ -1,4 +1,4 @@
-#serial 12
+#serial 13
 
 # Copyright (C) 1996-1998, 2001-2004, 2009-2010 Free Software Foundation, Inc.
 #
@@ -13,6 +13,23 @@ AC_DEFUN([gl_ERROR],
   gl_PREREQ_ERROR
 ])
 
+# Redefine AC_FUNC_ERROR_AT_LINE, because it is no longer maintained in
+# Autoconf.
+AC_DEFUN([AC_FUNC_ERROR_AT_LINE],
+[
+  AC_LIBSOURCES([error.h, error.c])dnl
+  AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <error.h>]],
+          [[error_at_line (0, 0, "", 0, "an error occurred");]])],
+       [ac_cv_lib_error_at_line=yes],
+       [ac_cv_lib_error_at_line=no])])
+  if test $ac_cv_lib_error_at_line = no; then
+    AC_LIBOBJ([error])
+  fi
+])
+
 # Prerequisites of lib/error.c.
 AC_DEFUN([gl_PREREQ_ERROR],
 [